JP2002099886A - Portable information processor and control method of portable information processor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a user to recognize the contents stored in a portable wireless device such as non-contact IC card or the like. SOLUTION: The portable wireless device comprises a display device for displaying the stored contents, a display drive circuit for executing the display, and a power source for operating the display drive circuit. When the user performs a prescribed operation to the portable wireless device, power is supplied only for a fixed period to operate the display drive circuit. The contents stored in the portable wireless device are displayed on the display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable information processing apparatus having a display device and a method for controlling the portable information processing apparatus.

[0002]

2. Description of the Related Art As one of portable wireless devices, for example, a non-contact type IC (Integrated Circuit) card (hereinafter, referred to as an IC card)
Simply referred to as a non-contact IC card). This non-contact IC card can perform wireless data communication with a dedicated read / write device installed at a ticket gate of a train, for example, and can settle train fares. For example, when a non-contact IC card is applied to a commuter pass, a complicated procedure such as taking out the commuter pass from the commuter pass and inserting it into the ticket gate becomes unnecessary. In addition, since data to be communicated with the read / write device can be encrypted, the security of the data is high and attention has been paid to the fact that there is no fear of illegal use such as forgery.

[0003]

However, non-contact ICs
Cards do not have power or display means, so unless you bring your card close to the read / write device,
The contents of the card could not be recognized. For this reason, at the stage where the user passes through the ticket gate, a situation may occur in which the user finds out that his or her card cannot be used due to insufficient balance. The present invention has been made in consideration of the above points, and in a portable wireless device such as a non-contact IC card, for example, a user can use a device (card).
It is an object of the present invention to provide an easy-to-use portable information processing apparatus and a control method for the portable information processing apparatus, which allow the user to always recognize the contents recorded in the portable information processing apparatus.

[0004]

In order to solve the above-mentioned problems, the configuration according to the first aspect operates when wireless communication is performed with an external device using wireless power supplied from the external device. A wireless communication unit, a storage unit for storing various data associated with the wireless communication, a display unit for performing various displays based on the data stored in the storage unit, and supplying display power to the display unit. A power supply unit, an operation unit for giving a display instruction on the previous display unit, and a power supply control unit for permitting the supply of the display power only for a predetermined period after the display instruction is given. Features.

According to a second aspect of the present invention, in the configuration of the first aspect, the power supply unit stores a solar cell that converts light energy into electric energy, and supplies the electric energy as a display power supply. And a power storage unit.

According to a third aspect of the present invention, when performing wireless communication with an external device, a wireless communication unit that operates by wireless power supplied from the external device and stores various data associated with the wireless communication. A storage unit for performing various displays based on data stored in the storage unit, and a display unit capable of holding a display state for a predetermined holding period in a power-off state, and a display unit for the display unit. A power supply unit for supplying power, and a power supply control unit for intermittently permitting the display unit to supply the display power to the display unit at a predetermined cycle shorter than the predetermined holding period are provided.

According to a fourth aspect of the present invention, in the configuration of the third aspect, the display unit is an electrophoretic display. According to a fifth aspect of the present invention, in the configuration of the fourth aspect, the power supply control unit includes a counting unit for counting the predetermined period.

According to a sixth aspect of the present invention, in the configuration according to any one of the first to fifth aspects, the wireless communication section includes the wireless communication section within a wireless communication area located near the external device. When the unit is located, the unit operates by wireless power supplied from the external device.

According to a seventh aspect of the present invention, in the configuration according to any one of the first to fifth aspects, when the wireless communication unit receives a communication request signal from the external device, It operates by wireless power supplied from the device.

According to an eighth aspect of the present invention, in the configuration of the first aspect, the storage unit is a nonvolatile memory.

According to a ninth aspect of the present invention, when performing wireless communication with an external device, the wireless communication unit operates by wireless power supplied from the external device, and stores various data associated with the wireless communication. Storage unit, a display unit that performs various displays based on data stored in the storage unit, a power supply unit that supplies display power to the display unit, and an operation for giving a display instruction on the display unit A step of detecting that the display instruction has been made, and permitting the supply of the display power only for a predetermined period after the display instruction is made. Characterized by having a process of performing

According to a tenth aspect of the present invention, when performing wireless communication with an external device, a wireless communication unit that operates by wireless power supplied from the external device and stores various data associated with the wireless communication. A display unit that performs various displays based on data stored in the storage unit, and that can hold a display state in a non-power supply state for a predetermined holding period, and a power supply that supplies display power. And a control unit for controlling the portable information processing apparatus, wherein the supply of the display power is intermittently permitted in a predetermined cycle shorter than the predetermined holding period.

According to an eleventh aspect of the present invention, in the configuration of the ninth or tenth aspect, the wireless communication unit is located within a wireless communication area located near the external device. When the unit is located, the unit operates by wireless power supplied from the external device.

According to a twelfth aspect of the present invention, in the configuration of the ninth or tenth aspect, when the wireless communication unit receives a communication request signal from the external device, It operates by wireless power supplied from the device.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

A: First Embodiment A1: Configuration of First Embodiment FIG. 1 shows a non-contact IC card 1 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a 00. The contactless IC card 100 includes a loop antenna 1 for performing wireless data communication with a dedicated read / write device 80, an integrated circuit 20 having a function of storing specific data processing and a data processing result, and a data processing. The display device 30 includes a display device 30 for displaying a result, an external operation unit 40 for prompting display on the display device 30, and a battery 50 serving as a power supply when displaying on the display device 30.

The loop antenna 1 has a read / write device 8
It is composed of a coil 1L for executing wireless communication with the signal 0 and a capacitor 1C for tuning a signal.
The capacity of the capacitor 1C is adjusted in advance so that signals from the read / write device 80 are synchronized.

The integrated circuit 20 is a circuit that performs various processes on a signal received from the loop antenna 1. More specifically, a rectifier circuit 3 for generating power from a received signal, a reference signal generating circuit 7 for generating a reference signal for timing signal processing from the received signal, a demodulation circuit 4 for demodulating the received signal,
It has a modulation circuit 5 for modulating a signal to be transmitted to the outside. Further, the integrated circuit 20 includes a conversion circuit 6 for performing serial / parallel conversion and parallel / serial conversion,
It has a control circuit 8 for controlling the entire integrated circuit 20, a cryptographic processing circuit 10 for processing a received signal by a predetermined program, and a memory 9 for storing the received signal. Further, a display drive circuit 11 for displaying the content recorded in the memory 9 on the display device 30 is provided.

The display device 30 is, for example, a liquid crystal device capable of performing a specific display operation by supplying a predetermined electric signal. In the present embodiment, considering the thin shape of the non-contact IC card 100,
As the substrate of the display device 30, plastic is more preferable than glass because it has flexibility.

The battery 50 is a thin circular lithium battery. The battery 50 is provided for performing display on the display device 30, and is specifically used as a power source for driving the display drive circuit 11. Here, in order to drive the display drive circuit 11, a large-capacity battery should be originally provided, but since the large-capacity battery also has a large shape, the portability and weight of the IC card 100 can be reduced. Be impaired. Therefore, in the present embodiment, the IC card 1
In order to ensure the portability of the battery, a small-capacity thin circular lithium battery is provided.

Therefore, if the display drive circuit 11 is always driven, the charge capacity of the battery 50 will soon be exhausted, causing a problem that the battery must be replaced frequently. In order to prevent such a problem from occurring, in the present embodiment, the display drive circuit 11 is driven only for a certain period after the user performs a predetermined operation on the external operation unit 40 described later. .

The external operation unit 40 is provided with the non-contact IC card 10.
It has a plurality of switches to be operated by 0 users. When a predetermined switch is operated by a user, the integrated circuit 20 has a function of outputting a signal to the effect that the content of the memory 9 is displayed on the display device 30.

FIG. 2 is a configuration diagram of the external operation unit 40. The external operation unit 40 includes a switch 41, a start circuit 42, and a transistor P1. The switch 41 is a two-contact type switch, and when a predetermined operation (for example, a pressing operation) is performed by a user, two end points of the switch 41 become conductive. The transistor P1 is a P-channel transistor, and is in an off state when the gate terminal is at a high level.
When the gate terminal is at a low level, it is turned on. The activation circuit 42 is a circuit that outputs the level of the gate terminal of the transistor P1 according to the state of the switch 41.

FIG. 3 shows the configuration of the starting circuit 42. The starting circuit 42 includes a capacitor C1, a resistor R1, and a transistor N1. The transistor N1 is an N-channel transistor, which is turned on when the gate terminal is at a high level and turned off when the gate terminal is at a low level. Starting circuit 42
Will be described later.

A2: Operation of the embodiment In order to make the contents of the present invention easy to understand, the operation of the non-contact IC card according to the embodiment will be described with reference to the drawings. Hereinafter, the operation at the time of data communication performed with the read / write device 80 and the operation of the memory 9 when the switch 41 is operated by the user.
The operation will be described separately for the operation of displaying the contents.

(1) An operation at the time of data communication performed with the read / write device 80. A modulated electromagnetic wave is output from the read / write device 80 and supplied to the loop antenna 1 of the non-contact IC card 100. When an analog reception signal is input via the coil 1L of the loop antenna 1 and the tuning capacitor 1C, the rectifier circuit 3 rectifies the analog reception signal and supplies the rectified signal to the demodulation circuit 4 and the like as a DC power supply. Thus, the non-contact IC card 100 is driven by the DC current supplied by the rectifier circuit 3.

After the non-contact IC card 100 is driven, the signal supplied from the read / write device 80 is demodulated by the demodulation circuit 4 under the control of the control circuit 8. The demodulated signal is sent to the cryptographic processing circuit 1
0 is stored in the memory 9. For example, when the read / write device 80 transmits a signal indicating that “the settlement of 500 yen is executed as the train fare”, the content is stored in the memory 9 via the encryption processing circuit 10. As a result, a value obtained by subtracting a value equivalent to 500 yen from the monetary value data stored in the memory 9 is newly stored in the memory 9.

On the other hand, the non-contact IC card 100 outputs to the read / write device 80 a signal for notifying that the signal from the read / write device 80 has been received. Specifically, the control circuit 8 generates a signal notifying that the signal has been received, and outputs the signal to the modulation circuit 5. After being modulated by the modulation circuit 5, the signal is transmitted to the read / write device 80 via the loop antenna 1. When receiving the notification signal from the non-contact IC card 100, the read / write device 80 recognizes that the wireless communication has been normally performed. If this notification signal cannot be received, read /
The light device 80 recognizes that wireless communication was not performed normally. For example, when the read / write device is applied to the ticket gate of a train, control is performed to close the gate of the ticket gate, and the user or the like is clearly notified that wireless communication with the non-contact IC card 100 was not normally performed. I do.

Thus, the non-contact IC card 100
Executes wireless data communication with the read / write device 80. The above operation is performed by operating the rectifier circuit 3 by a signal output from the read / write device 80 and by a power supply generated by the operation of the rectifier circuit 3. That is, since the battery 50 inside the non-contact IC card 100 is not used, the capacity of the battery 50 is not wasted. An area D1 in FIG. 1 indicates an area to which power generated by the rectifier circuit 3 is supplied in the above operation.

(2) Display Operation of Non-Contact IC Card 100 Next, the operation of displaying the content stored in the memory 9 of the non-contact IC card 100 on the display device 30 will be described. When the user wants to display the contents of the non-contact IC card 100 on the display device 30, the user operates the switch 41 of the external operation unit 40.

In FIG. 2, a switch 41 is set by a user.
Is operated and the switch 41 is turned on, the activation circuit 42 operates. The operation of the activation circuit 42 will be described in detail with reference to FIG. When the switch 41 is turned on, the gate terminal of the transistor N1 becomes high level.
The transistor N1 is turned on. At this time, the potential Vb of the drain terminal of the transistor N1 becomes equal to the potential VSS of the source terminal, so that the potential of Vb drops to Vss (low level). Therefore, the gate terminal of the transistor P1 becomes low level, so that the transistor P1 is turned on. Therefore, the voltage Vdd at the source terminal of the transistor P1 becomes equal to the voltage Va at the drain terminal, and as a result, power is supplied from the battery 50 to the integrated circuit 20.

When power is supplied to the integrated circuit 20, power is supplied to the control circuit 8 and the display drive circuit 11, and the contents stored in the memory 9 are displayed on the display device 30. . A region D2 in FIG. 1 shows a region where power is supplied from the battery 50 at this time.

Once the switch 41 is operated by the user, the capacitor C1 is charged. For this reason, after that, the user stops the operation of the switch 41 and the voltage Vb of the source terminal of the transistor N1 is at a high level for a while after the switch 41 is insulated. In this case, the transistor P
1 keeps the ON state, and the power is continuously supplied from the battery 50 to the integrated circuit 20. Therefore, if the user operates the switch 41 once, the display operation on the display device 30 is maintained for a while, which is convenient for the user.

As described above, the non-contact I according to the present embodiment
The user of the C card 100 can cause the display device 30 to display the content stored in the non-contact IC card 100 at any time. Therefore, even in the case where the contactless IC card 100 is used for a train, it is possible to use the card after confirming the contents of the card in advance, and it becomes clear that the balance is insufficient only after passing through the ticket gate. Easy-to-use non-contact IC that can not cause such inconvenient situations
A card 100 can be provided. The contactless card 100
Is provided with a display device 230 and a display drive circuit 211 for driving the display device 230. However, it is not necessary to always supply power from the battery 50 to the display drive circuit 211, so that the battery 50 has a small capacity. However, there is no need to frequently change the batteries.

B: Second Embodiment FIG. 4 is a block diagram showing the configuration of a non-contact IC card 200 according to this embodiment. The contactless IC card 200
Compared to the non-contact IC card 100 according to the first embodiment, the physical characteristics of the display device 230 and the point that a counter circuit 81 is provided in the control circuit 8 are different. Only the parts different from the first embodiment described above will be described.

The display device 230 according to the present embodiment is characterized in that display is performed by utilizing physical properties of electrophoresis. In a normal display device, for example, a display device using liquid crystal as a display element, a display operation is performed by driving a display drive circuit and applying a predetermined drive voltage to change the arrangement of liquid crystal molecules. When the driving of the display driving circuit is stopped, a predetermined driving voltage is not applied to the liquid crystal, so that the arrangement of the liquid crystal molecules is restored and the display operation of the display device is completed. On the other hand, the display device 230 according to the embodiment causes the display element to form a predetermined electric field,
A display operation is performed by physically moving (migrating) particles constituting the display element. For this reason, even when the driving of the display drive circuit is stopped, the moved (migrated) particles can maintain their state for a certain period of time, and as a result, display contents are held for a certain period of time. The period for retaining the display contents (hereinafter referred to as display retention period) depends on the size and type of the particles constituting the display element, but it is possible to secure a display retention period of several days to several tens of days, for example. is there. On the other hand, the time for driving the display drive circuit to perform display once is about several tens μsec.

FIG. 5 is a diagram for explaining the display operation of the display device 230. In FIG. 5, tw indicates the display device 2
30 is the drive time of the display drive circuit 211 required to display one screen of data. In addition, tp indicates a time (display holding period) in which, when one screen of data is displayed, the display content is continuously displayed on the display device 230. As described above, while tw is several tens μsec, tp can take a long time of several days to several tens of days. Therefore, it is possible to maintain the display of the display device 230 without supplying a large amount of power to continuously drive the display driving circuit 211.

Next, the counter circuit 81 will be described. The counter circuit 81 is a circuit that outputs a timing signal at predetermined intervals. The length of this cycle can be arbitrarily changed by adjusting the circuit configuration of the counter circuit 81. In the present embodiment, the counter circuit 8
1 each time a timing signal is output from the control circuit 2
Reference numeral 08 controls the display drive circuit 211 to operate for tp (several tens of μsec). That is, the display drive circuit 211 is driven by the timing signal output from the counter circuit 81 as much as necessary to display one screen on the display device 210. The cycle of the counter circuit 81 is set to a time tp2 slightly shorter than the display holding period tw.

FIG. 6 is a diagram for explaining the operation of the present embodiment. As shown in FIG.
If the display for one screen is performed at 0, the display driving circuit 211 operates and a new display for one screen is performed before the period during which the display is held (display holding period tw) elapses. The display operation is always performed on the display device 230. In addition, since the display driving device 211 only needs to be driven for a short period of time, power consumption can be suppressed to a very small value. Even if the battery 250 has a small capacity, the battery must be replaced frequently. A troublesome situation, such as no, cannot occur.

In this embodiment, the display device 23
The timing of display at 0 may be performed not only when a timing signal is output from the counter circuit 81 but also when data communication with the read / write device 80 is performed. By performing such control, even when the storage content of the non-contact IC card 200 changes, new content is always displayed on the display unit 230.

C: Third Embodiment FIG. 7 is a block diagram showing the configuration of a non-contact IC card 300 according to this embodiment. The non-contact IC card 300
Compared to the non-contact IC card 100 described above, the difference is that a solar cell is used instead of the battery 50 and that a voltage detection circuit 318 is provided in the control circuit 308. Therefore, in the following description, only the portions different from the above-described embodiment will be described.

FIG. 8 shows a circuit configuration around the solar cell 350. FIG. 9 is an external view of the non-contact IC card 300 according to the present embodiment. In the circuit configuration illustrated in FIG. 8, when a light amount equal to or more than a predetermined light amount is incident on the solar cell 350, the solar cell 350 converts light energy into electric energy. When the electric energy is supplied to the integrated circuit 320, the display driving circuit 311 operates, and as a result, a display is displayed on the display device 330.

The transistor LT is provided in consideration of the fact that the power supply exceeds the absolute maximum voltage of the integrated circuit 320 when the solar cell 350 is irradiated with high illuminance light. When a voltage higher than a predetermined voltage is supplied to the voltage detection circuit 318 of the control circuit 308, the transistor LT
The gate terminal voltage to high level. Then, the transistor LT is turned on, so that the voltage generated by the solar cell 350 is bypassed. In this way, the risk of destruction of integrated circuit 320 is avoided.

The capacitor C2 is provided to prevent a state in which power is not supplied to the integrated circuit 320 when the transistor LT is turned on. That is, when a light amount equal to or more than a certain light amount is incident on the solar cell 350, the capacitor C2 is charged.
When the transistor LT is turned on, the integrated circuit 3
20 is a power supply source. Also, the diode D1
Is provided to prevent a current from flowing backward when the transistor LT is turned on.

As described above, when the solar cell 350 is irradiated with an amount of light equal to or more than a predetermined amount, the display driving circuit 311 operates, and display is performed on the display device 30. Therefore, the user can use the solar cell 35
By irradiating light to 0, the contents of the non-contact IC card 300 can be displayed and recognized when desired. The electric power stored in the capacitor C2 is stored in the IC card 300.
May also be performed when the device is in wireless communication with an external device (read / write device 50). In this case, the wireless power supplied from the external device is stored in the capacitor C2 via the rectifier circuit in the integrated circuit 320. Then, it functions as a power supply source for the display drive circuit 311.

D: Modifications Although the embodiment of the present invention has been described above, the above embodiment is merely an example of the present invention, and can be arbitrarily modified within the scope of the present invention. For example, the following can be considered.

(1) Modification Example 1 In each of the embodiments described above, independent embodiments have been described, but these contents may be combined. For example, the switch 4 according to the first embodiment
1. Any combination of the counter circuit 81 according to the second embodiment and the solar cell 350 according to the third embodiment may be used. For example, the switch 41 according to the first embodiment
Is operated by the user, the counter circuit 81 according to the second embodiment is driven, and the drive circuit of the display device may be operated according to a signal output from the counter circuit 81 at a predetermined timing. Switch 4
1 may be operated, and control may be performed to operate the display drive circuit only when a certain amount of light is supplied to the solar cell 350 at that time.

(2) Modification 2 The present invention can be applied to any portable device having a display device, which limits the power consumption for displaying on the display device. Is possible. For example, the present invention can be applied to a wristwatch-type electronic device having a function of a non-contact type IC card. In this case, the same effect as described above can be obtained.

[0049]

As described above, according to the present invention,
For example, a user of an electronic device or device such as a non-contact IC card can prompt the user to display the contents at any time.
It is possible to provide a user-friendly non-contact IC card or the like.

[Brief description of the drawings]

FIG. 1 is a diagram showing a structure of a non-contact IC card according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a circuit configuration of an external operation unit of the IC card.

FIG. 3 is a diagram showing a circuit configuration of a starting circuit of the IC card.

FIG. 4 is a diagram showing a structure of a non-contact IC card according to a second embodiment of the present invention.

FIG. 5 is a diagram for explaining the operation of the display unit of the IC card.

FIG. 6 is a diagram for explaining the operation of the IC card.

FIG. 7 is a view showing a structure of a non-contact IC card according to a third embodiment of the present invention.

FIG. 8 is a diagram for explaining a power supply portion of the IC card.

FIG. 9 is a diagram showing an appearance of the IC card.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Loop antenna, 1L ... Coil, 1C ... Capacitor, 3 ... Rectifier circuit, 4 ... Demodulation circuit, 5 ... Modulation circuit, 6 ... Conversion circuit, 7 ... Reference signal generation circuit, 8 ...
... Control circuit, 9 ... Memory, 10 ... Encryption processing circuit, 1
DESCRIPTION OF SYMBOLS 1 ... Display drive circuit, 20 ... Integrated circuit, 30 ... Display device, 40 ... External operation part, 50 ... Battery, 80 ... Read / write device, 100 ... Non-contact IC card.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B011 DA06 DA11 EA06 EB09 KK02 MA03 5B035 AA00 BB09 BC00 CA06 CA12 CA23

Claims (12)

[Claims] When performing wireless communication with an external device, a wireless communication unit that operates using wireless power supplied from the external device; a storage unit that stores various data associated with the wireless communication; A display unit for performing various displays based on data stored in the display unit, a power supply unit for supplying display power to the display unit, an operation unit for giving a display instruction on the display unit in the previous period, and the display instruction A power supply control unit for permitting the supply of the display power only during a predetermined period after the operation is performed. 2. The power supply unit includes: a solar cell that converts light energy into electric energy; and a power storage unit that stores the electric energy and supplies the electric energy as a display power supply. A portable information processing apparatus according to claim 1. 3. When performing wireless communication with an external device, a wireless communication unit that operates using wireless power supplied from the external device; a storage unit that stores various data associated with the wireless communication; Performing various displays based on data stored in the unit, a display unit capable of holding a display state in a power supply non-supply state for a predetermined holding period, and a power supply unit for supplying display power to the display unit. And a power supply control unit for intermittently permitting the display unit to supply the display power to the display unit at a predetermined cycle shorter than the predetermined holding period. 4. The portable information processing device according to claim 3, wherein the display unit is an electrophoretic display. 5. The portable information processing device according to claim 4, wherein the power supply control unit includes a counting unit for counting the predetermined period. 6. The wireless communication unit operates with wireless power supplied from the external device when the wireless communication unit is located in a wireless communication area located near the external device. The portable information processing apparatus according to any one of claims 1 to 5, characterized in that: 7. The wireless communication unit according to claim 1, wherein the wireless communication unit operates by wireless power supplied from the external device when receiving a communication request signal from the external device. Item 6. A portable information processing device according to any one of Items 5. 8. The portable information processing apparatus according to claim 1, wherein the storage unit is a nonvolatile memory. 9. When performing wireless communication with an external device, a wireless communication unit that operates using wireless power supplied from the external device; a storage unit that stores various data associated with the wireless communication; A portable unit comprising: a display unit for performing various displays based on data stored in the unit; a power supply unit for supplying display power to the display unit; and an operation unit for giving a display instruction on the display unit. The method for controlling a type information processing apparatus, comprising: a step of detecting that the display instruction is performed; and a step of permitting the supply of the display power only for a predetermined period after the display instruction is performed. A method for controlling a portable information processing device. 10. When performing wireless communication with an external device, a wireless communication unit that operates using wireless power supplied from the external device, a storage unit that stores various data associated with the wireless communication, and the storage unit A portable unit that performs various displays based on data stored in the unit, and that can hold a display state in a non-power supply state for a predetermined holding period, and a power supply unit that supplies display power. A control method for a portable information processing device, comprising: intermittently permitting the supply of the display power in a predetermined cycle shorter than the predetermined holding period. 11. The wireless communication unit operates with wireless power supplied from the external device when the wireless communication unit is located in a wireless communication area located near the external device. The control method for a portable information processing device according to claim 9, wherein 12. The wireless communication unit according to claim 9, wherein the wireless communication unit operates by wireless power supplied from the external device when receiving a communication request signal from the external device. Item 11. The control method for a portable information processing device according to any one of Items 10.